A simple sub group : Group « Regular Expressions « Java Tutorial

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class MainClass {
  public static void main(String args[]) {
    Pattern p = Pattern.compile("\\w(\\d)");
    String candidate = "A6 is Audi";

    Matcher matcher = p.matcher(candidate);
    if (matcher.find()) {
      String tmp = matcher.group(0);

      tmp = matcher.group(1);

8.3.1.A simple sub group
8.3.2.Working with simple groups
8.3.3.Find the end point of the first sub group (ond)
8.3.4.Finding Every Occurrence of the Letter A